Lightning has struck twice: Just last month we were commenting on how difficult it is to crack the kids graphic novel chart (see "June 2018 NPD BookScan – Top 20 Kids Graphic Novels"). But a look at this month's chart of the top 20 kids graphic novels for the month of July, based on NPD BookScan data for July (7/1/2018 – 7/29/18) provided to ICv2, shows it has happened for the second month in a row: once again, a graphic novel based on a popular media property has zoomed out of nowhere onto the charts.

Last month it was PopularMMOS Presents A Hole New World, a graphic novel by a YouTube star whose shtick is MineCraft videos. That book, which just came out on June 1, debuted at number five last month and is in the number two slot this month.

The new title is Gravity Falls: Lost Legends, which collects a quartet of stories set in the world of the Disney XD animated series Gravity Falls, which ran from 2014 to 2016. It's possible that the artist for the anthology, including fan favorites Jacob Chabot, Mike Holmes, and Meredith Gran, brought their own followers to the book, and of course series has followers of its own. Gravity Falls: Lost Legends was just released on July 1, so for it to make the number 11 slot in one month is a pretty impressive feat.

Don't expect this to happen a third time though: The next Dog Man book, subtitled Lord of the Fleas, is due out on August 28— and given the enormous popularity of everything Dav Pilkey does, it may make the chart based on just three days’ sales.

NPD BookScan collects weekly point-of-sale data on print books from over 16,000 locations including e-tailers, chains, mass merchandisers, independent bookstores, and more. NPD BookScan covers approximately 85% of the U.S. trade print book market. The ranks on this chart are based on piece sales. Some publishers classify titles that are primarily text, or art books, as graphic novels; we've removed those titles from the ranking above.